Digital clock



FIG. 1 is a left front perspective view of a digital clock showing mynew design;

FIG. 2 is a right rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a rear elevational view thereof.

The ornamental design for a digital clock, as shown.